Dear Michel, Us 57 cc



Some testing results so far:

18x10Clark 8200rpm

20x10Clark 6400 rpm

20x12Clark 6000 rpm

24x10Zinger 5400 rpm



I hope this helps and let me know, what you think about this performance.



100cc twin will make it or the 150 twin.

24x10Zinger with 7200-7400rpm with the 100cc single.



If you have any more questions, please write me again.



Respectfully yours,

Hanspeter Naef



USQ Aero, Inc.

400 Cheryl Ave.

Mechanicsburg, PA 17055



Tel: +1 717 343 1529

Fax: +1 717 790 9642

Web: www.us-engines.com